Home / 1,555.23-2,145.61-891.73

Finding the Fourth Proportional to 1,555.23, 2,145.61 and 891.73

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Solution

The fourth proportional to 1,555.23, 2,145.61 and 891.73 is: 1,230.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.23 : 2,145.61 = 891.73 : x
  2. Step 2: Convert to fraction form
    1,555.23/2,145.61 = 891.73/x
  3. Step 3: Cross multiply
    1,555.23x = 2,145.61 × 891.73
  4. Step 4: Simplify right side
    1,555.23x = 1,913,304.81
  5. Step 5: Solve for x
    x = 1,913,304.81/1,555.23
  6. Step 6: Final answer
    x = 1,230.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.